Improvement in union-couplings



UNITED STATES PATENT QEEICE. N

WILLIAM B. SNOW, OF BROOKLYN, ASSIGNOR TO EATON &1COLE, NEW YORK, N. Y.

IMPROVEMENT IN UNION-COUPLINGS.

Specification forming part of Letters Patent No. 139,203, dated May 20, 1873; application filed April 9, 1073.

To all whom t may concern: i

Be it known that I, WILLIAM B. SNOW, of Brooklyn, in the county of Kings and State of New York, have invented an Improved Union-Coupling, of which the following is a specification This invention is mainly designed to take the place of the ordinary pipe-coupling, in-

' the iirst, partly unscrewing the coupling from such rst section ot' pipe by screwing it onto the second or contiguous section, the two lengths or sections ot' pipe are united as required. The main object of my invention is to dispense with the elongated screwthread on the one section of pipe, which is objectionable, not only on account of its weakening the pipebut also as regards construction and in other respects.

The invention consists in a combination of a pipe extension-piece, provided with internal and external screw-threads, a screw socket or sleeve, and jam-nut, whereby both sections of pipe may be litted with alimited length of screw-thread, and vet the same provision for coupling the two sectionsot' pipe be obtained as it' the one of said sections had an elongated screw-thread upon it likewise, whereby a tight and eicient coupling, generally, is produced.

In the accompanying drawing, which forms partfot' this specitication, Figure l represents a longitudinal outside view of a coupling constructed `in accordance with. my invention, and Fig. 2 a `longitudinal sectional view of the same as applied to the ends of two lengths i or sections ot' pipe.

Similar letters of reference indicate correspending parts.

A represents one length or section of' pipe, and A another length or section thereof, subject to connection by my improved coupling,

which is composed, in part, of a pipe extension-piece, B, having a female thread. 1),.on its one end for the purpose ot' attaching it to the pipe-section A by screwing it onto a male thread, c, thereon. The remainder otl this pipe extension-piece B has an elongated external screw-thread, d, on it, corresponding in diameter and pitch with a male thread, c, on the end of the pipe-section A.

C is the coupling-screw socket or sleeve, made i y made tight, or leakage past the screw-thread d. prevented, by a jam-nut, D, and packing` E, ttted onto or over the screw-threaded portion d of the pipe extension-piece Cf.

What is hereclaiined, and desired to be se` cured by Letters Patent, is

The independent pipe extension-piece B, having a female thread, b, and male thread d, as described, in combination with the conplin g-screw socket or sleeve C and jam-nut D, for operation, in relation with the externally screw-threaded ends ot' the pipe sections or lengths A A', substantially as specified.

Witnesses: W. B. SNOW.

FEED. HAYNES, MICHAEL RYAN. 

